help bewteen 3 spells for main DPS skill

Hey all,

I was wondering what everyone thinks of shock nova VS firestorm VS Frost Nova in terms of overall best damaging spell. I’m running a templar currently and cant decide which of the three would be better to run and was hoping you all could help me out. Currently using firestorm but it looks like shock nova + knockback totem would work well too. Fire seems to have the most readily available %dmg increase as well. Really unsure what to do.

Here is my current set up
http://www.pathofexile.com/passive-skill-tree/AAAAAgUABVuLjOFz7SBG113G3fNgbZ2AgzjvfLaGfVN65udq1HyCmylP7DgaOKeEkFXAGmaeqZVwfU99gFYaMnFNms9DY7cxWPWdxBRNogAEs4FvnjxN2Ix2

Thanks for the help guys.